The rate constant of a certain reaction is known to obey the Arrhenius equation, and to have an activation energy $E_a$ = 12.0 kJ/mol. If the rate constant of this reaction is $6.7 \times 10^7$ M$^{-1}$s$^{-1}$ at 15.0 $^\circ$C, what will the rate constant be at 69.0 $^\circ$C?
Round your answer to 2 significant digits.
k = \boxed{} M$^{-1}$s$^{-1}$
